Liquid-expressing apparatus



March 6, 1928.

Filed Feb. 25. 1926 Patented Mari s, 1928.

WWW- AT em PAUL nursorrnacntg or mmune, GERMANY, assreuon fro FRIED. KBUPI causew- WERE nx'rrnriensnmsonam, or 'MAGDEBURG-BUGKAU, GEBMAJVY, A F131;.

7 LTEQUID EXPRESSING APPARATUS.

Application filed February 25, 1926, Serial No. 90,712, and in Germany February 25, 1825.

The invention relates to a contrivance for pressing out liquid matter from materials of any kind in double cage presses and is designed especially for the pressing of oleaginous materials In the processes hitherto in use with double cage presses usually the work was done by filling the intermediate space between outer and inner cages with material. and by pressing this material by means of a. ram. the ram being acted upon for instance by hydraulic force. This mode of pressing has various disadvantages of which the most essential is thateach charge has to be pressed separately. It is true that with one-cage presses with Worm pressing a continuous Working is possible, but the out-flow of oil from these presses is deficient and in spite of their continuous Working the output of these presses is small. The object ofthe invention is to attain the greatest utilization of the press room in straining presses. In the press room itself no 1nechauical pressure devices are required so that the entire capacity of the press room can be utilized continuously for the press ing. The device forsqueezing of the material into the press, not only creates the pressure necessary for extracting the liquid matter, but it also kneads the material at the same time to a certain extent, whereby the extracting of the liquid matter is improved considerably. Practical tests have proved that by the new process a very much greater output of the press and a better discharge of the liquid matter is obtained and that at the same time the costs of making and working a cage press are diminished considerably. The pressure to be obtained in the press room can be regulated either by making the means for squeezing the material into the press room adjustable ormalring the means for discl'iarging the pressed materialout of the press room adjustable or by making them both adjustable. The devices used for squeezing the material into the press may be of various forms, for instance one or more thumb-like squeezing blades can be used which rotate above the inlet slit of the press room. For discharging the material there may be used for instance scrapers or knives rotating in the outlet of the press room. The squeezing blades and the discharging tools may also be in fixed position and the cage may be arranged to rotate. The section of the press room may'also be the same throughout or ma be different, for instance may be diminished inthe known manner at the outlet. If it seems suitable in special cases, one or more squeezing thumb like irons may be provided insidethe press room. These can be fixedfor instance to the inner or outer cage and this cage ar ranged to rotate; The proceeding of squeezing and kneading would in such a case be repeated one or, several times. *Butas a rule the squeezing-in at the inlet will be suflicient; 1

- The invention is illustrated in the accompanying drawing in which an embodiment is shown in vertical section. ,1

The double cage press consists of the outer cage 1 and the. inner cage 2. In the press room 3 formed by these two cages, the material to be pressed, for. instance oil seed, is filled in through the inlet 4. At the inlet slit of the press room 3 there rotates a thumb 5 which squeezes the material fed continuously through the inlet 4: into the press room 3. The thumb 5 is shown in another position in dotted lines at 5. The material is kneaded to some extent by the thumb 5,- which facilitates the expression of the oil. The continuous filling up and squeezing of the material causes a compression of the material inside of the press room 3, in consequence of which the liquid is pressed out through the openings of the cages 1 and 2. The continuous filling up and squeezing of the material causes a con1- pression of the material being inside of the press room 3. In consequence of the pressure caused thereby the liquid being pressed out flows through the openings of the cages 1 and 2; The residues compressed to a cake at the lower part of the cage are removed,

by means of knives or scrapers 6 which rotate underneath the double cage and project into the outlet slit of the press room 3. In order to be able of material to be discharged, the disc" carrying the knives 6 is arranged to be movedaxially, and it can be adjusted for instance by means of a lever 8 for various positions of height. When the pressure in the press room is too great, the knives 6 105 are pushed deeper into the outlet slit. When I the pressure is too small, the knives are lowered. The squeezing thumb 5 is made adjustable on or with its support also in order to regulate the degree of pressure. 110

to modify the quantity Above the intake end of the press is ararranged a-lev'er 9 whichis pivoted at 10 on a the frame of the press and whose free end isloaded, with a weight 11. The lever 9 is linkd'.;;to aring'fl3 on the" hub 12 of thumb fii" If a, stoppage occurs'because of an mcrease in pressure 1n thepress, chainbe r 3, the pressure is transmitted upwardly andw'raises the lever 9., Thedischarging devicefi is then forced deeper into the outlet'l ifofithe press chamber sothat a more active*discharging .of the press vchamber takes place. when the pressure in the press chamber returns to normal, the thumb 5 automatically drops into its normal working position and the discharging device 6 is also lowered. into normal position. For the purpose of regulating the pressure also the cage can be made axially adjustable. Besides, the squeezing'and discharging Work can be regulated by changing the relative rotational speed of the squeezing and dischargingtools on one :hand and the double cage on the other hand Iclaim: W i

1; A straining press for en ressing'liquid constituents from materials 0 various kinds comprising the combination with a substan tially vertically disposed press-chamber having an annular cross section and being open at the top and bottom, ofmeans a apted to supply the material inj a [continuous stream under its own gravitation to the up per end of said press chamber, a feeding element adapted to force thelmaterial continuously into said press chamber, to com- "press it therein and to cause it to travel therethrough, sai'd feeding element being arranged substantially outslde the press cham- "ber proper and working only at the actual intakeport of the same, and means for continuously discharging the exhausted material at the bottom end ofsaid press chum ber.

2. A straining press in accordance with claim 1 in which the meansfor continuously discharging the exhausted material at the bottom end of the press chamber comprises an axially adjustable scraper projecting into the bottom end of said press chamber, and

means for causing said scraper to travel PAUL KUTSGHBACH. 

